EP2676164A1 - Improved method for manufacturing a reflector, preferably for the solar energy field - Google Patents

Improved method for manufacturing a reflector, preferably for the solar energy field

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Publication number
EP2676164A1
EP2676164A1 EP12703128.4A EP12703128A EP2676164A1 EP 2676164 A1 EP2676164 A1 EP 2676164A1 EP 12703128 A EP12703128 A EP 12703128A EP 2676164 A1 EP2676164 A1 EP 2676164A1
Authority
EP
European Patent Office
Prior art keywords
mirror
support structure
elements
manufacturing
relative
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP12703128.4A
Other languages
German (de)
French (fr)
Other versions
EP2676164B1 (en
Inventor
Frédéric VIDAL
Raphaël Couturier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Commissariat a lEnergie Atomique CEA, Commissariat a lEnergie Atomique et aux Energies Alternatives CEA filed Critical Commissariat a lEnergie Atomique CEA
Publication of EP2676164A1 publication Critical patent/EP2676164A1/en
Application granted granted Critical
Publication of EP2676164B1 publication Critical patent/EP2676164B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
    • G02B7/182—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors
    • G02B7/183—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors specially adapted for very large mirrors, e.g. for astronomy, or solar concentrators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • F24S23/82—Arrangements for concentrating solar-rays for solar heat collectors with reflectors characterised by the material or the construction of the reflector
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/62—Optical apparatus specially adapted for adjusting optical elements during the assembly of optical systems
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
    • G02B7/182—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • F24S2023/87—Reflectors layout
    • F24S2023/872—Assemblies of spaced reflective elements on common support, e.g. Fresnel reflectors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining

Definitions

  • the present invention relates to the field of manufacturing mirror reflectors for reflecting and directing light.
  • reflectors whose support structure of the mirror is intended to be movable so as to orient the received light at different angles.
  • Such reflectors, movable support structure or not, can be used for producing reflector fields, for example Fresnel type.
  • the invention applies in particular to the field of solar energy, in particular for the production of systems comprising a solar collector and a field of reflectors concentrating the solar radiation on the sensor.
  • a mold on which the mirror is provisionally assembled, the mold giving the final shape to this mirror. Then, a step is made to position the mirror relative to the rear structure, by relative displacement between the mold supporting the mirror and the same rear structure. It can be provided that the mirror comes directly in abutment against the support structure at the end of the aforementioned step. Nevertheless, this requires very low manufacturing tolerances for the support structure, with a significant impact on the manufacturing cost.
  • Another solution is to ensure that at the end of the aforementioned step, the mirror is found at a distance from the rear structure, these two elements adopting their final relative position.
  • blocks of adhesive previously installed on the support structure or on the mirror, then heated, are deformed during this step of setting up the mirror, being sandwiched between the mirror and its support structure. moving relative to each other. After drying the deformed adhesive blocks, they provide the mechanical connection between the mirror and its support structure.
  • the heating necessary for the softening of the adhesive blocks constitutes an additional constraint in the manufacturing process, not to mention that it is also likely to generate residual defects of shape, due to shrinkages potentially observed during cooling.
  • the disassembly of the mirror can be performed by heating the deformed adhesive blocks, which also complicates this disassembly operation.
  • the object of the invention is therefore to remedy at least partially the disadvantages mentioned above, relating to the embodiments of the prior art.
  • the invention firstly relates to a method of manufacturing a reflector comprising a mirror supported by a support structure, said method comprising a step of placing the mirror in position relative to said support structure by relative displacement of a mold supporting the mirror, with respect to said support structure.
  • the method also comprises a step of adjusting a plurality of connecting elements between the mirror and the support structure, in a fastening position in which they are intended to be secured to the mirror and the support structure, this adjustment step, carried out during said positioning step of the mirror and / or thereafter, leading to a displacement of at least some, and preferably all of the elements. junction relative to said support structure.
  • the joining elements are metallic, or else ceramic or polymeric material. In the remainder of the description, without this being limiting, the joining elements will be considered as metallic. Whatever the material selected, they have a sufficient rigidity not to deform during said adjustment step.
  • the solution according to the present invention makes it possible to adopt very high manufacturing tolerances for the support structure, without this being detrimental for maintaining the shape of the mirror. Indeed, the metal joining elements, whatever their shape, can be moved at high amplitudes during the adjustment step and / or after this, without this having any effect on the rigidity of maintaining the mirror obtained at the end of the process. This therefore contrasts with the known solutions of the prior art, where only blocks of glue are interposed between the mirror and the support structure.
  • the method according to the invention reinforces the mechanical strength of the mirror on its structure, which leads to an improvement of the optical properties conferred by the mirror.
  • flat surfaces no longer need to be specifically provided on the structure to support the plastic glue blocks.
  • a first possibility of implementing the method consists in ensuring that said adjustment step, leading to the displacement of at least some of the metal joining elements relative to said support structure, is performed at least partially automatically during said step of positioning the mirror, after supporting the relevant metal connecting elements against said mirror.
  • said metal joining elements are preferably intended to be bonded to the mirror, for example by a standard adhesive, requiring heating or not for its application.
  • a standard adhesive requiring heating or not for its application.
  • Another possibility is the use of a double-sided tape, which gives ease of use.
  • said metal joining elements are preferably intended to be secured to the support structure by gluing and / or screwing and / or welding and / or riveting.
  • said metal joining elements are intended to be secured by gluing on the mirror and / or on the support structure, and said metal joining elements are glued before the implementation of the adjustment step.
  • said metal joining elements are elongated elements, for example pegs, housed slidably housed in corresponding orifices of the support structure, said elongated elements being introduced into the corresponding orifices. before their support against the mirror.
  • these elements are introduced into their orifices after the step of positioning the mirror, sliding in these same orifices, sliding which is then stopped by taking support of the elongated junction elements against the mirror.
  • the elongated elements can already be housed in their orifices before carrying out the step of placing the mirror in position, being retained in these orifices by appropriate means, for example by throat / pin connections holding them in position d 'end.
  • One possibility is to retain them by viscosity effect glue.
  • the sliding of the elongated elements in their orifices is preferably performed automatically during the subsequent adjustment step, after the contact elements of the junction with the mirror have come into contact, as has been described previously.
  • said elongate metal joining elements are held by gravity bearing against the mirror, in their position of attachment. Then, these elements are secured to the mirror and the support structure by setting implementation of a specific step, or possibly by the observation of a simple drying time when the joining elements have been previously glued.
  • said metal joining elements are sections of overall T-shaped section whose base of each of them is doubled so as to reveal between the two bases a space penetrated by a sliding part of the support structure, which slides in this space during said positioning step of the mirror.
  • this sliding could be performed exclusively after the step of positioning the mirror, without departing from the scope of the invention.
  • a mixed solution is also possible, with some of the profiles moved during and possibly after the implementation step. Mirror position, and other profiles moved only after this step.
  • each profile is mounted on the support structure before the implementation of said step of positioning the mirror, by pinching said sliding portion of the corresponding support structure, between the two bases of the profile.
  • said metal joining elements are lugs having a bearing head on the mirror, as well as a body connected to the support structure by a sliding connection formed by a groove traversed by at least two during said adjusting step, at least some of the metal joining elements move automatically relative to said support structure by moving the screws in the groove, after pressing the bearing heads against said mirror.
  • the groove in which screws slide can indifferently be practiced on the support structure, or on the connecting elements.
  • the latter arranged in the securing position are secured to the support structure by screwing said screws, this screwing being effected automatically or manually.
  • This embodiment is particularly advantageous in that it makes it easy to reuse the support structure when the mirror needs to be changed.
  • said mirror is preferably not flat, and made of glass, aluminum or polymer. These characteristics are naturally dissociable.
  • shape of the mirror may for example be of the single curvature panel type or double curvature.
  • the single-curved panels are said to be “developable” and have a rectilinear generatrix implying that they can be “unwound” on a plane.
  • double panels curvature are not “developable” and therefore do not have a rectilinear generator, that is to say that they can not be “unrolled” on a plane. Indeed, they have a first curvature, for example in the longitudinal direction of the panel, and a second curvature distinct from the first, for example in the transverse direction of the same panel.
  • the invention also relates to a field of reflectors each manufactured according to the method defined above.
  • This field is for example of the Fresnel type, with the reflectors arranged side by side and each support structure pivotally mounted on a frame.
  • the invention also relates to a system comprising a solar collector and such a field of reflectors concentrating the solar radiation on the sensor.
  • FIGS. 1a to 1b show perspective views of a system according to a preferred embodiment of the invention, comprising a solar collector and a field of reflectors of the Fresnel type;
  • FIGS. 2a and 2b are perspective views, according to two distinct angles of view, of a reflector intended to be obtained according to a first embodiment preferred embodiment of the manufacturing method according to the invention
  • FIG. 3a to 3c show front views schematically different steps of the manufacturing method according to the first preferred embodiment
  • FIGS. 4a to 4c show perspective views of those shown in FIGS. 3a to 3c, respectively;
  • FIGS. 5a and 5b are perspective views, according to two distinct angles of view, of a reflector intended to be obtained according to a second preferred embodiment of the manufacturing method according to the invention.
  • FIGS. 6a to 6d show perspective views schematizing different steps of the manufacturing method according to the second preferred embodiment
  • Figures 7a and 7b are perspective and front views of a reflector to be obtained according to a third preferred embodiment of the manufacturing method according to the invention.
  • FIGS 8a and 8b show perspective views schematically showing different steps of the manufacturing method according to the third preferred embodiment.
  • a system 1 comprising a solar collector 2 and a field of reflectors 4 concentrating the solar radiation on the sensor.
  • the Field 4 for example of the Fresnel type, comprises a row of reflectors 6 arranged side by side.
  • each reflector 6 comprises a mirror assembled on a support structure, the latter being pivotally mounted on a frame 8.
  • the axes of rotation 10 of the reflectors are preferably parallel. Their rotation control may be independent or dependent, and controlled in such a way as to best focus the solar radiation on the sensor 2.
  • the figures 1a to 3 show three distinct configurations in which the incident light rays 12 have different orientations. each configuration being associated with a particular rotational setting of all the reflectors of the field 4, making it possible to orient the reflected rays 14 on the sensor 2 as well as possible.
  • It is preferably a so-called high flux sensor, for various applications, for example heating a heat transfer fluid of the water, oil or molten salt type, or for the photovoltaic field with concentration.
  • Its power is between several tens of kW / m 2 and some MW / m 2 .
  • Each reflector 6, of rectangular overall shape, has an area of several square meters. The precision generally required on this type of system is of the order of 0.1 ° for the angular setting of the reflectors.
  • the reflector 6 comprises first of all a mirror 16, of non-planar shape, made of glass on a thickness of about 4 mm, and typically between 0.1 and 7 mm. Its shape here is simple curvature. Nevertheless, other forms may be envisaged, without departing from the scope of the invention.
  • It also comprises a support structure 18, for example of roughly parallelepiped shape, solid or hollow. It can be made of steel, with high manufacturing tolerances. It has means allowing the rotation of the reflector along the axis 10, here rotation pins 19.
  • the mechanical connection between the support structure 18 and the mirror 16 does not occur over the entire internal surface of the latter, but with the aid of a plurality of connecting elements 20 interposed between the mirror and the structure, being attached to them.
  • These rigid elements are preferably metallic, but could alternatively be ceramic or polymeric material. Bonding is preferably carried out here by gluing, even if other conventional means can be used, without departing from the scope of the invention. Of course, in the case of the use of a polymer material adhesive and joining elements of polymer material, the two polymeric materials used are different.
  • These elements 20 are elongated, for example pegs or bars, housed in orifices 22 in the position of FIGS. 2a and 2b, the upper end of the rods 20 is glued to the internal face of the mirror, whereas the part of the lateral surface accommodated in the structure 18 is glued on the part of the lateral surface facing the corresponding orifice 22.
  • the pegs 20 are for example made of an aluminum-based alloy, while the adhesive used may be of the pasty polyurethane glue single-component type, for example glue sold by the company 3M under the reference “Polyurethane Adhesive Sealant 560 ". Another example is the glue sold by the company Hutchinson / l under the reference "PR1440".
  • the viscosity of the chosen adhesive is preferably sufficient to remain localized at the level of the connection between the connecting elements and the mirror and / or the rear structure.
  • the glue is chosen, more particularly, from the glues having, after drying, a Young model of between 2 and 60 MPa, and a hardness of between 20 and 60 shore A.
  • pegs 20 on the mirror it may be a double-sided tape.
  • the mirror is first shaped on a mold 30, then secured to the latter temporarily, for example using a conventional adhesive, or by vacuum drawing. It is the mold 30 which therefore temporarily applies the final shape to the mirror 16.
  • the support structure is placed motionless in a known reference frame, in which the mold / mirror assembly moves vertically upwards in the direction of this structure, as shown schematically by the arrow 32 in FIGS. 3a and 4a.
  • the mold / mirror assembly moves vertically upwards in the direction of this structure, as shown schematically by the arrow 32 in FIGS. 3a and 4a.
  • these pins are maintained by gravity support against the mirror. Then, these pegs 20 are bonded to the mirror and the support structure 18, as shown schematically in Figures 3c and 4c on which the gray portions 36, 38 correspond to glue. If these rods were previously glued before their introduction into the orifices 22 of the structure 18, then simply observe a simple drying time to obtain the hardening of this glue.
  • the reflector 6 comprises first a mirror 16, of non-planar shape, made of glass to a thickness of about 4 mm. Its shape here is simple curvature, very little pronounced. Nevertheless, other forms can be envisaged without departing from the scope of the invention.
  • a support structure 18 for example made from a cylinder 136 from which generally triangular ribs 138 project. These ribs 138, spaced along the cylinder 136 and orthogonal to the latter, have their ends connected by two substantially planar longitudinal members 140.
  • This structure 18 may be made of steel, with large manufacturing tolerances. It has means for rotating the reflector along the axis 10, here rotating pins 19 constituted by the two ends of the cylinder 136.
  • the mechanical connection between the support structure 18 and the mirror 16 is not made over the entire internal surface of the latter, but with the aid of a plurality of metallic joining elements 120 interposed between the mirror and the elements of the structure 138, 140, being secured to them. Bonding is preferably done here by gluing, even if other conventional means can be employed without departing from the scope of the invention.
  • the elements 120 are T-shaped overall section sections whose base of each of them is doubled so as to show between the two bases a space penetrated by a sliding part the structural elements 138, 140.
  • the profiles 120 are for example made of an aluminum-based alloy, while the adhesive used may be of the pasty type polyurethane single-component glue, for example glue sold by 3M under the reference “Polyurethane Adhesive Sealant 560 ".
  • glue the end of the profiles 120 on the mirror it may be a double-sided tape.
  • the glue employed has a certain flexibility, unlike the more rigid junction elements, which makes it possible to reduce the mechanical stresses to which the mirror is subjected and / or to absorb shocks caused by the weather.
  • the mirror maintained in shape by them has very satisfactory optical properties.
  • the mirror 16 is first shaped on a mold 30, then secured to the latter temporarily, for example using a conventional adhesive. This step is schematized in Figure 6a. It is the mold 30 which therefore temporarily applies the final shape to the mirror 16.
  • each section 120 has a section of overall T shape, the base of each of which is doubled so as to reveal between the two parallel bases 142a, 142b a space 144.
  • the support structure is placed motionless in a known reference frame, in which the mold / mirror assembly moves vertically upwards in the direction of this structure, as shown schematically by the arrow 32 in FIG. 6d.
  • this step of positioning the mirror 16 it is found opposite and at a distance from the structure 18, these two elements then adopting their final relative position.
  • One of the peculiarities of this second preferred embodiment lies in the fact that a step of adjusting the profiles 120 is performed at least partly automatically during the previously described step of positioning the mirror, shown in FIG. Figure 6d.
  • the slip is not the same for each profile 120, nor necessarily identical at each point of the profile.
  • the parallel bases 142a, 142b can be equipped with grooves 150 spaced longitudinally from each other to give flexibility to the profiles in the same longitudinal direction, during their step d ustement. This flexibility of the profile also makes it possible not to print in negative the flat head 146 profiles on the mirror, which could alter the properties of the mirror.
  • the grooves 150 make it possible to promote the evacuation of the glue added in surplus, as well as the drying of the glue implemented in the context of the process.
  • the extent of the sliding is therefore a function of the distance between the mirror and the edges of the elements 138, 140 opposite this mirror. It is also noted that these edges can be made with large tolerances, without this being pre-udiciable to maintain the shape of the mirror, since the latter is carried directly by the head 146 of the profiles 120, and not by these edges lodged in the inter-base spaces 140 of the profiles.
  • the aforementioned sliding can be continued after the step of placing the mirror in position, for example to improve the support of the heads 146 against the mirror, and / or, where appropriate, to remove the surplus glue from the profiles 120 which have been previously glued. This can be done manually, or automatically.
  • the step of adjusting the profiles 120 is completed, and they then occupy their position of attachment corresponding to their final position with respect to the mirror and the support structure, these profiles being always held by pinching on the structural elements 138, 140. Then, the profiles 120 are glued to the mirror and to the support structure 18. In the event that the profiles have been previously glued before assembly on the structural elements 138, 140, then simply observe a simple drying time to obtain the hardening of this glue.
  • the reflector 6 comprises first a mirror 16, of non-planar shape, made of glass to a thickness of about 4 mm. Its shape here is simple curvature, very little pronounced. Nevertheless, other forms can be envisaged without departing from the scope of the invention.
  • This structure 18 also comprises a support structure 18, for example made from a cylinder 136 from which generally triangular ribs 138 project. These ribs 138 are spaced along the cylinder 136 and orthogonal to the latter.
  • This structure 18 can be made of steel, with high manufacturing tolerances. It has means for rotating the reflector along the axis 10, here rotating pins 19 constituted by the two ends of the cylinder 136.
  • the mechanical connection between the support structure 18 and the mirror 16 does not occur over the entire internal surface of the latter, but with the aid of a plurality of metal connecting elements 220 interposed between the mirror and the ribs 138. , in being attached to them.
  • the fastening is preferably carried out here by gluing at the mirror and by screwing at the level of the support structure 18, even if other conventional means can be used without departing from the scope of the invention.
  • the metal joining elements 220 are tabs having a bearing head on the mirror, and a body connected to the support structure by a sliding connection formed by a groove through which the minus two screws.
  • the tabs 220 are for example made of an aluminum-based alloy, while the adhesive used may be of the one-component polyurethane pasty glue type, for example glue sold by the company 3M under the reference “Polyurethane Adhesive Sealant 560 ".
  • glue the end of the profiles 120 on the mirror it may be a double-sided tape.
  • the screws are in turn preferably made of steel.
  • the mirror 16 is first shaped on a mold 30, and then secured to the latter temporarily, for example using a conventional adhesive. It is the mold 30 which therefore temporarily applies the final shape to the mirror 16.
  • each leg 220 has a bearing head 250 intended to be applied against the mirror, as well as a vertical body. 252 bearing this head.
  • the body is provided with a vertical straight groove 254 traversed by two screws 256 belonging to bolts, these screws being housed in passage holes (not shown) of the ribs 138.
  • the screws 256 are put in place through the through holes and through the grooves 254, and the associated nuts are screwed to the ends of these screws.
  • a tab adjustment step 220 is performed at least partially automatically during the previously described step of positioning the mirror, shown in FIG. Figure 8b.
  • the sliding is not the same for each leg 220.
  • the extent of the sliding is a function of 1 'distance between the mirror and the edges of the ribs 138 facing this mirror.
  • These ribs can therefore be made with large tolerances, without this being pre-usable for maintaining the shape of the mirror, since the latter is carried directly by the head 250 of the tabs 220, and not by the ribs 138.
  • the aforementioned sliding can be continued after the step of placing the mirror in position, for example to improve the support of the heads 250 against the mirror, and / or, where appropriate, to remove the surplus glue of the legs 220 which have been previously glued. This can be done manually, or automatically.
  • leg adjustment step 220 is completed, and the latter then occupy their securing position corresponding to their final position with respect to the mirror and the support structure, these legs being always held by the bolts. . Then, these tabs 220 are glued on the mirror. In the event that they have been previously glued before their assembly on ribs 138, it is then sufficient to observe a simple drying time to obtain the hardening of this glue.
  • the bolts are tightened so as to prohibit any relative displacement between the ribs 138 and the tabs 220.
  • the connection is therefore made here by screwing.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Astronomy & Astrophysics (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Thermal Sciences (AREA)
  • Sustainable Energy (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Mounting And Adjusting Of Optical Elements (AREA)

Abstract

The invention relates to a method for manufacturing a reflector (6) including a mirror (16) supported by a support structure (18), said method including a step of positioning the mirror relative to the structure by means of the relative movement of a mold (30) supporting the mirror in relation to said structure. According to the invention, the method also includes a step of adjusting a plurality of elements (20) for linking the mirror and the structure together, said step being carried out during the mirror-positioning step and/or thereafter, and causing the movement of at least some of the linking elements relative to the structure (18).

Description

PROCEDE DE FABRICATION AMELIORE D'UN REFLECTEUR, DE PREFERENCE POUR LE DOMAINE DE L'ENERGIE SOLAIRE  METHOD FOR IMPROVED MANUFACTURING OF A REFLECTOR, PREFERABLY FOR THE FIELD OF SOLAR ENERGY
DESCRIPTION DESCRIPTION
DOMAINE TECHNIQUE TECHNICAL AREA
La présente invention se rapporte au domaine de la fabrication de réflecteurs à miroir pour réfléchir et orienter la lumière.  The present invention relates to the field of manufacturing mirror reflectors for reflecting and directing light.
Elle concerne en particulier la fabrication de réflecteurs dont la structure de support du miroir est destinée à être mobile afin de pouvoir orienter la lumière reçue selon différents angles. De tels réflecteurs, à structure de support mobile ou non, peuvent être utilisés pour la réalisation de champs de réflecteurs, par exemple du type Fresnel.  It relates in particular to the manufacture of reflectors whose support structure of the mirror is intended to be movable so as to orient the received light at different angles. Such reflectors, movable support structure or not, can be used for producing reflector fields, for example Fresnel type.
L'invention s'applique en particulier au domaine de l'énergie solaire, notamment pour la réalisation de systèmes comprenant un capteur solaire ainsi qu'un champ de réflecteurs concentrant le rayonnement solaire sur le capteur.  The invention applies in particular to the field of solar energy, in particular for the production of systems comprising a solar collector and a field of reflectors concentrating the solar radiation on the sensor.
ÉTAT DE LA TECHNIQUE ANTÉRIEURE STATE OF THE PRIOR ART
Pour la fabrication d'un réflecteur comprenant un miroir supporté par une structure de support, il est habituellement prévu un moule sur lequel est assemblé provisoirement le miroir, le moule donnant la forme définitive à ce miroir. Ensuite, il est réalisé une étape de mise en position du miroir par rapport à la structure arrière, par déplacement relatif entre le moule supportant le miroir et cette même structure arrière. On peut prévoir que le miroir vienne directement en appui contre la structure de support à la fin de l'étape précitée. Néanmoins, cela requiert des tolérances de fabrication très faibles pour la structure de support, avec un impact non négligeable sur le coût de fabrication. For the manufacture of a reflector comprising a mirror supported by a support structure, there is usually provided a mold on which the mirror is provisionally assembled, the mold giving the final shape to this mirror. Then, a step is made to position the mirror relative to the rear structure, by relative displacement between the mold supporting the mirror and the same rear structure. It can be provided that the mirror comes directly in abutment against the support structure at the end of the aforementioned step. Nevertheless, this requires very low manufacturing tolerances for the support structure, with a significant impact on the manufacturing cost.
Une autre solution consiste à faire en sorte qu'à la fin de l'étape précitée, le miroir se retrouve à distance de la structure arrière, ces deux éléments adoptant leur position relative définitive. Dans ce cas de figure, des blocs de colle préalablement installés sur la structure de support ou sur le miroir, puis chauffés, sont déformés au cours de cette étape de mise en place du miroir, en étant enserrés entre ce miroir et sa structure de support se déplaçant relativement l'un par rapport à l'autre. Après séchage des blocs de colle déformés, ceux-ci assurent la liaison mécanique entre le miroir et sa structure de support .  Another solution is to ensure that at the end of the aforementioned step, the mirror is found at a distance from the rear structure, these two elements adopting their final relative position. In this case, blocks of adhesive previously installed on the support structure or on the mirror, then heated, are deformed during this step of setting up the mirror, being sandwiched between the mirror and its support structure. moving relative to each other. After drying the deformed adhesive blocks, they provide the mechanical connection between the mirror and its support structure.
Cette solution, notamment décrite dans le document US 20090260753A1, permet d'adopter des tolérances de fabrication plus élevées pour la structure de support, même si des surfaces planes spécifiques doivent être prévues sur cette structure pour supporter les blocs de colle en plastique.  This solution, in particular described in document US 20090260753A1, makes it possible to adopt higher manufacturing tolerances for the support structure, even if specific flat surfaces must be provided on this structure to support the plastic glue blocks.
En outre, plus les tolérances de fabrication sont élevées, plus les blocs de colle doivent être de volume important pour compenser les défauts de fabrication. Or l'utilisation de blocs de colle de volume important engendre des problèmes de tenue mécanique du miroir sur sa structure, et ne sont donc pas recommandés. En particulier, aux endroits où la colle est trop volumineuse, son manque de rigidité peut créer une déformation locale du miroir, qui s'accompagne nécessairement d'une baisse des propriétés optiques conférées par ce dernier. In addition, the higher the manufacturing tolerances, the larger the adhesive blocks must be to compensate for manufacturing defects. However, the use of large volume glue blocks causes problems of mechanical strength of the mirror on its structure, and is not therefore not recommended. In particular, in places where the glue is too large, its lack of rigidity can create a local deformation of the mirror, which is necessarily accompanied by a decrease in the optical properties conferred by the latter.
Enfin, le chauffage nécessaire au ramollissement des blocs de colle constitue une contrainte supplémentaire dans le procédé de fabrication, sans compter qu'il est également susceptible de générer des défauts de forme résiduels, en raison de retraits potentiellement observés au refroidissement. Par ailleurs, le démontage du miroir ne peut s'effectuer qu'en réchauffant les blocs de colle déformés, ce qui complexifie également cette opération de démontage.  Finally, the heating necessary for the softening of the adhesive blocks constitutes an additional constraint in the manufacturing process, not to mention that it is also likely to generate residual defects of shape, due to shrinkages potentially observed during cooling. Furthermore, the disassembly of the mirror can be performed by heating the deformed adhesive blocks, which also complicates this disassembly operation.
EXPOSÉ DE L' INVENTION STATEMENT OF THE INVENTION
L' invention a donc pour but de remédier au moins partiellement aux inconvénients mentionnés ci- dessus, relatifs aux réalisations de l'art antérieur.  The object of the invention is therefore to remedy at least partially the disadvantages mentioned above, relating to the embodiments of the prior art.
Pour ce faire, l'invention a tout d'abord pour objet un procédé de fabrication d'un réflecteur comprenant un miroir supporté par une structure de support, ledit procédé comprenant une étape de mise en position du miroir par rapport à ladite structure de support par déplacement relatif d'un moule supportant le miroir, par rapport à ladite structure de support.  To do this, the invention firstly relates to a method of manufacturing a reflector comprising a mirror supported by a support structure, said method comprising a step of placing the mirror in position relative to said support structure by relative displacement of a mold supporting the mirror, with respect to said support structure.
Selon l'invention, le procédé comprend également une étape d'ajustement d'une pluralité d'éléments de jonction entre le miroir et la structure de support, dans une position de solidarisation dans laquelle ils sont destinés à être solidarisés au miroir et à la structure de support, cette étape d'ajustement, réalisée durant ladite étape de mise en position du miroir et/ou après celle-ci, conduisant à un déplacement d'au moins certains, et de préférence de l'ensemble des éléments de jonction relativement à ladite structure de support. De préférence, les éléments de jonction sont métalliques, ou encore en céramique ou en matériau polymère. Dans la suite de la description, sans que cela ne soit limitatif, les éléments de jonction seront considérés comme métalliques. Quel que soit le matériau retenu, ils présentent une rigidité suffisante pour ne pas se déformer au cours de ladite étape d'ajustement. According to the invention, the method also comprises a step of adjusting a plurality of connecting elements between the mirror and the support structure, in a fastening position in which they are intended to be secured to the mirror and the support structure, this adjustment step, carried out during said positioning step of the mirror and / or thereafter, leading to a displacement of at least some, and preferably all of the elements. junction relative to said support structure. Preferably, the joining elements are metallic, or else ceramic or polymeric material. In the remainder of the description, without this being limiting, the joining elements will be considered as metallic. Whatever the material selected, they have a sufficient rigidity not to deform during said adjustment step.
La solution selon la présente invention permet d'adopter des tolérances de fabrication très élevées pour la structure de support, sans que cela ne soit néfaste pour le maintien en forme du miroir. En effet, les éléments de jonction métalliques, quelle que soit leur forme, peuvent être déplacés selon des amplitudes élevées durant l'étape d'ajustement et/ou après celle-ci, sans que cela n'ait d'incidence sur la rigidité de maintien du miroir obtenue en fin de procédé. Cela contraste donc avec les solutions connues de l'art antérieur, où seuls des blocs de colle sont interposés entre le miroir et la structure de support.  The solution according to the present invention makes it possible to adopt very high manufacturing tolerances for the support structure, without this being detrimental for maintaining the shape of the mirror. Indeed, the metal joining elements, whatever their shape, can be moved at high amplitudes during the adjustment step and / or after this, without this having any effect on the rigidity of maintaining the mirror obtained at the end of the process. This therefore contrasts with the known solutions of the prior art, where only blocks of glue are interposed between the mirror and the support structure.
Par conséquent, le procédé selon l'invention renforce la tenue mécanique du miroir sur sa structure, ce qui conduit à une amélioration des propriétés optiques conférées par le miroir. En outre, des surfaces planes n'ont plus à être prévues spécifiquement sur la structure pour supporter les blocs de colle en plastique. Therefore, the method according to the invention reinforces the mechanical strength of the mirror on its structure, which leads to an improvement of the optical properties conferred by the mirror. In addition, flat surfaces no longer need to be specifically provided on the structure to support the plastic glue blocks.
Enfin, en raison de l'absence des blocs de colle de grande dimension, aucun chauffage ne s'avère nécessaire, même si un tel chauffage peut être retenu en fonction des moyens de solidarisation employés entre les éléments de jonction métalliques et le miroir ainsi que la structure de support.  Finally, due to the absence of large size adhesive blocks, no heating is necessary, even if such a heating can be retained depending on the fastening means employed between the metal connecting elements and the mirror and the support structure.
Une première possibilité de mise en œuvre du procédé consiste à faire en sorte que ladite étape d'ajustement, conduisant au déplacement d'au moins certains des éléments de jonction métalliques relativement à ladite structure de support, s'effectue au moins partiellement automatiquement durant ladite étape de mise en position du miroir, après appui des éléments de jonction métalliques concernés contre ledit miroir .  A first possibility of implementing the method consists in ensuring that said adjustment step, leading to the displacement of at least some of the metal joining elements relative to said support structure, is performed at least partially automatically during said step of positioning the mirror, after supporting the relevant metal connecting elements against said mirror.
C'est donc bien l'appui contre le miroir et la poursuite du déplacement relatif entre ce dernier et la structure de support arrière qui conduisent au déplacement des éléments de jonction relativement à cette structure. Le caractère automatique du déplacement est naturellement avantageux en ce qu' il simplifie la mise en œuvre du procédé. Néanmoins, ce déplacement peut être poursuivi après l'étape de mise en position du miroir, par exemple pour améliorer l'appui des éléments de jonction contre le miroir, et/ou, le cas échéant, enlever la colle en surplus des éléments de jonction préalablement encollés. Une seconde possibilité de mise en œuvre du procédé consiste à faire en sorte que ladite étape d'ajustement, conduisant au déplacement d'au moins certains des éléments de jonction métalliques relativement à ladite structure de support, s'effectue exclusivement après ladite étape de mise en position du miroir. Cette étape est alors réalisée manuellement ou de manière automatisée, en fonction de la conception retenue pour les éléments de jonction. It is therefore the support against the mirror and the continued relative displacement between the latter and the rear support structure that lead to the displacement of the connecting elements relative to this structure. The automatic nature of the displacement is naturally advantageous in that it simplifies the implementation of the method. Nevertheless, this displacement can be continued after the step of placing the mirror in position, for example to improve the support of the connecting elements against the mirror, and / or, if necessary, to remove the surplus glue from the joining elements. previously glued. A second possibility of implementing the method consists in ensuring that said adjustment step, leading to the displacement of at least some of the metal joining elements relative to said support structure, is carried out exclusively after said step of setting in position of the mirror. This step is then performed manually or automatically, depending on the design adopted for the connecting elements.
Par ailleurs, il est noté que lesdits éléments de jonction métalliques sont préférentiellement destinés à être collés sur le miroir, par exemple par une colle standard, nécessitant un chauffage ou non pour son application. Une autre possibilité réside dans l'emploi d'un scotch double-face, qui confère une simplicité d'utilisation.  Furthermore, it is noted that said metal joining elements are preferably intended to be bonded to the mirror, for example by a standard adhesive, requiring heating or not for its application. Another possibility is the use of a double-sided tape, which gives ease of use.
De plus, lesdits éléments de jonction métalliques sont préférentiellement destinés à être solidarisés sur la structure de support par collage et/ou vissage et/ou soudage et/ou rivetage.  In addition, said metal joining elements are preferably intended to be secured to the support structure by gluing and / or screwing and / or welding and / or riveting.
De préférence, lesdits éléments de jonction métalliques sont destinés à être solidarisés par collage sur le miroir et/ou sur la structure de support, et lesdits éléments de jonction métalliques sont encollés avant la mise en œuvre de l'étape d'ajustement. Bien entendu, une alternative est possible, dans laquelle le collage s'effectue après l'étape d'ajustement, c'est-à-dire après que les éléments de jonction aient atteint leur position de solidarisation . Selon un premier mode de réalisation préféré de l'invention, lesdits éléments de jonction métalliques sont des éléments allongés, par exemple des piges, logées logés à coulissement dans des orifices correspondants de la structure de support, lesdits éléments allongés étant introduits dans les orifices correspondants avant leur appui contre le miroir. Preferably, said metal joining elements are intended to be secured by gluing on the mirror and / or on the support structure, and said metal joining elements are glued before the implementation of the adjustment step. Of course, an alternative is possible in which the bonding is performed after the adjustment step, that is to say after the joining elements have reached their securing position. According to a first preferred embodiment of the invention, said metal joining elements are elongated elements, for example pegs, housed slidably housed in corresponding orifices of the support structure, said elongated elements being introduced into the corresponding orifices. before their support against the mirror.
De préférence, ces éléments sont introduits dans leurs orifices après l'étape de mise en position du miroir, par coulissement dans ces mêmes orifices, coulissement qui est alors stoppé par prise d'appui des éléments de jonction allongés contre le miroir. En alternative, les éléments allongés peuvent déjà être logés dans leurs orifices avant de réaliser l'étape de mise en position du miroir, en étant retenus dans ces orifices par des moyens appropriés, par exemple par des liaisons gorge/pion les retenant en position d'extrémité. Une possibilité consiste à les retenir par effet de viscosité du à la colle. Dans ces cas, le coulissement des éléments allongés dans leurs orifices s'effectue de préférence automatiquement durant l'étape ultérieure d'ajustement, après l'entrée en contact des éléments de jonction avec le miroir, comme cela a été décrit précédemment.  Preferably, these elements are introduced into their orifices after the step of positioning the mirror, sliding in these same orifices, sliding which is then stopped by taking support of the elongated junction elements against the mirror. Alternatively, the elongated elements can already be housed in their orifices before carrying out the step of placing the mirror in position, being retained in these orifices by appropriate means, for example by throat / pin connections holding them in position d 'end. One possibility is to retain them by viscosity effect glue. In these cases, the sliding of the elongated elements in their orifices is preferably performed automatically during the subsequent adjustment step, after the contact elements of the junction with the mirror have come into contact, as has been described previously.
Dans ce premier mode de réalisation préféré, il est préférentiellement prévu qu'à la fin de l'étape d'ajustement, lesdits éléments de jonction métalliques allongés sont maintenus par gravité en appui contre le miroir, dans leur position de solidarisation . Ensuite, ces éléments sont solidarisés au miroir et à la structure de support par mise en œuvre d'une étape spécifique, ou bien éventuellement par l'observation d'un simple temps de séchage lorsque les éléments de jonction ont été préalablement encollés . In this first preferred embodiment, it is preferentially provided that at the end of the adjustment step, said elongate metal joining elements are held by gravity bearing against the mirror, in their position of attachment. Then, these elements are secured to the mirror and the support structure by setting implementation of a specific step, or possibly by the observation of a simple drying time when the joining elements have been previously glued.
Selon un second mode de réalisation préféré, lesdits éléments de jonction métalliques sont des profilés de section en forme globale de T dont la base de chacun d'eux est doublée de manière à laisser apparaître entre les deux bases un espace pénétré par une partie de glissement de la structure de support, qui glisse dans cet espace durant ladite étape de mise en position du miroir.  According to a second preferred embodiment, said metal joining elements are sections of overall T-shaped section whose base of each of them is doubled so as to reveal between the two bases a space penetrated by a sliding part of the support structure, which slides in this space during said positioning step of the mirror.
Ici, c'est l'appui contre le miroir et la poursuite du déplacement relatif entre ce dernier et la structure de support arrière qui conduisent au glissement des éléments de jonction relativement à cette structure. Le caractère automatique du déplacement est naturellement avantageux en ce qu' il simplifie la mise en œuvre du procédé. Néanmoins, ce glissement peut être poursuivi après l'étape de mise en position du miroir, par exemple pour améliorer l'appui des éléments de jonction contre le miroir, et/ou, le cas échéant, enlever la colle en surplus des éléments de jonction préalablement encollés.  Here, it is the support against the mirror and the continuation of the relative displacement between the latter and the rear support structure that lead to the sliding of the connecting elements relative to this structure. The automatic nature of the displacement is naturally advantageous in that it simplifies the implementation of the method. Nevertheless, this sliding can be continued after the positioning step of the mirror, for example to improve the support of the connecting elements against the mirror, and / or, where appropriate, to remove the surplus glue from the joining elements. previously glued.
Alternativement, ce glissement pourrait être réalisé exclusivement après l'étape de mise en position du miroir, sans sortir du cadre de l'invention. Une solution mixte est également envisageable, avec certains des profilés déplacés pendant et éventuellement après l'étape de mise en position du miroir, et d'autres profilés déplacés seulement après cette étape. Alternatively, this sliding could be performed exclusively after the step of positioning the mirror, without departing from the scope of the invention. A mixed solution is also possible, with some of the profiles moved during and possibly after the implementation step. Mirror position, and other profiles moved only after this step.
Enfin, une autre alternative peut consister à poser les profilés sur le miroir avant la mise en œuvre de l'étape de mise en place du miroir, au cours de laquelle le glissement s'opère automatiquement avec les parties associées de la structure de support.  Finally, another alternative may be to put the profiles on the mirror before the implementation of the step of placing the mirror, during which the sliding takes place automatically with the associated parts of the support structure.
Cependant, de préférence, chaque profilé est monté sur la structure de support avant la mise en œuvre de ladite étape de mise en position du miroir, par pincement de ladite partie de glissement de la structure de support correspondante, entre les deux bases du profilé.  However, preferably, each profile is mounted on the support structure before the implementation of said step of positioning the mirror, by pinching said sliding portion of the corresponding support structure, between the two bases of the profile.
Selon un troisième mode de réalisation préféré, lesdits éléments de jonction métalliques sont des pattes présentant une tête d'appui sur le miroir, ainsi qu'un corps relié à la structure de support par une liaison glissière formée par une rainure traversée par au moins deux vis, et, durant ladite étape d'ajustement, au moins certains des éléments de jonction métalliques se déplacent automatiquement relativement à ladite structure de support par déplacement des vis dans la rainure, après appui des têtes d'appui contre ledit miroir.  According to a third preferred embodiment, said metal joining elements are lugs having a bearing head on the mirror, as well as a body connected to the support structure by a sliding connection formed by a groove traversed by at least two during said adjusting step, at least some of the metal joining elements move automatically relative to said support structure by moving the screws in the groove, after pressing the bearing heads against said mirror.
Ici aussi, c'est l'appui contre le miroir et la poursuite du déplacement relatif entre ce dernier et la structure de support arrière qui conduisent au déplacement des éléments de jonction relativement à cette structure, grâce au déplacement des vis dans la rainure. Le caractère automatique du déplacement est naturellement avantageux en ce qu'il simplifie la mise en œuvre du procédé. Néanmoins, ce glissement peut être poursuivi après l'étape de mise en position du miroir, par exemple pour améliorer l'appui des éléments de jonction contre le miroir, et/ou, le cas échéant, enlever la colle en surplus des éléments de jonction préalablement encollés. Here too, it is the support against the mirror and the continuation of the relative displacement between the latter and the rear support structure which lead to the displacement of the connecting elements relative to this structure, thanks to the displacement of the screws in the groove. The automatic nature of the displacement is naturally advantageous in that it simplifies the setting implementation of the method. Nevertheless, this sliding can be continued after the positioning step of the mirror, for example to improve the support of the connecting elements against the mirror, and / or, where appropriate, to remove the surplus glue from the joining elements. previously glued.
Dans ce mode de réalisation, la rainure dans laquelle coulissent des vis peut indifféremment être pratiquée sur la structure de support, ou sur les éléments de jonction.  In this embodiment, the groove in which screws slide can indifferently be practiced on the support structure, or on the connecting elements.
Dans ce troisième mode de réalisation préféré, après ladite étape d'ajustement des éléments de jonction métalliques, ces derniers agencés en position de solidarisation sont solidarisés à la structure de support par vissage desdites vis, ce vissage s' effectuant de manière automatisée ou manuellement .  In this third preferred embodiment, after said step of adjusting the metal joining elements, the latter arranged in the securing position are secured to the support structure by screwing said screws, this screwing being effected automatically or manually.
Ce mode de réalisation est particulièrement avantageux en ce qu' il permet de réutiliser facilement la structure de support lorsque le miroir doit être changé .  This embodiment is particularly advantageous in that it makes it easy to reuse the support structure when the mirror needs to be changed.
Quelque soit le mode de réalisation envisagé, ledit miroir n'est de préférence pas plan, et réalisé à base de verre, d'aluminium ou de polymère. Ces caractéristiques sont naturellement dissociables. Concernant la forme du miroir, il peut par exemple être du type panneau à simple courbure ou à double courbure. A titre informatif, les panneaux à simple courbure sont dits « développables », et présentent une génératrice rectiligne impliquant qu'ils peuvent être « déroulés » sur un plan. En revanche, les panneaux à double courbure ne sont pas « développables » et ne disposent donc pas de génératrice rectiligne, c'est-à-dire qu'ils ne peuvent pas être « déroulés » sur un plan. Effectivement, ils présentent une première courbure, par exemple dans la direction longitudinale du panneau, ainsi qu'une seconde courbure distincte de la première, par exemple dans la direction transversale de ce même panneau . Whatever the embodiment envisaged, said mirror is preferably not flat, and made of glass, aluminum or polymer. These characteristics are naturally dissociable. Regarding the shape of the mirror, it may for example be of the single curvature panel type or double curvature. For information purposes, the single-curved panels are said to be "developable" and have a rectilinear generatrix implying that they can be "unwound" on a plane. In contrast, double panels curvature are not "developable" and therefore do not have a rectilinear generator, that is to say that they can not be "unrolled" on a plane. Indeed, they have a first curvature, for example in the longitudinal direction of the panel, and a second curvature distinct from the first, for example in the transverse direction of the same panel.
L'invention a également pour objet un champ de réflecteurs chacun fabriqué selon le procédé défini ci-dessus. Ce champ est par exemple du type Fresnel, avec les réflecteurs agencés côte à côte et chaque structure de support montée pivotante sur un bâti.  The invention also relates to a field of reflectors each manufactured according to the method defined above. This field is for example of the Fresnel type, with the reflectors arranged side by side and each support structure pivotally mounted on a frame.
Enfin, l'invention a également pour objet un système comprenant un capteur solaire ainsi qu'un tel champ de réflecteurs concentrant le rayonnement solaire sur le capteur.  Finally, the invention also relates to a system comprising a solar collector and such a field of reflectors concentrating the solar radiation on the sensor.
D'autres avantages et caractéristiques de l'invention apparaîtront dans la description détaillée non limitative ci-dessous.  Other advantages and features of the invention will become apparent in the detailed non-limiting description below.
BRÈVE DESCRIPTION DES DESSINS BRIEF DESCRIPTION OF THE DRAWINGS
Cette description sera faite au regard des dessins annexés parmi lesquels ;  This description will be made with reference to the appended drawings among which;
- les figures la à le représentent des vues en perspective d'un système selon un mode de réalisation préféré de l'invention, comprenant un capteur solaire ainsi qu'un champ de réflecteurs du type Fresnel ;  FIGS. 1a to 1b show perspective views of a system according to a preferred embodiment of the invention, comprising a solar collector and a field of reflectors of the Fresnel type;
les figures 2a et 2b sont des vues en perspective, selon deux angles de vue distincts, d'un réflecteur destiné à être obtenu selon un premier mode de réalisation préféré du procédé de fabrication selon 1 ' invention ; FIGS. 2a and 2b are perspective views, according to two distinct angles of view, of a reflector intended to be obtained according to a first embodiment preferred embodiment of the manufacturing method according to the invention;
- les figures 3a à 3c représentent des vues de face schématisant différentes étapes du procédé de fabrication selon le premier mode de réalisation préféré ;  - Figures 3a to 3c show front views schematically different steps of the manufacturing method according to the first preferred embodiment;
- les figures 4a à 4c représentent des vues en perspective de celles montrées sur les figures 3a à 3c, respectivement ;  FIGS. 4a to 4c show perspective views of those shown in FIGS. 3a to 3c, respectively;
- les figures 5a et 5b sont des vues en perspective, selon deux angles de vue distincts, d'un réflecteur destiné à être obtenu selon un second mode de réalisation préféré du procédé de fabrication selon 1 ' invention ;  FIGS. 5a and 5b are perspective views, according to two distinct angles of view, of a reflector intended to be obtained according to a second preferred embodiment of the manufacturing method according to the invention;
- les figures 6a à 6d représentent des vues en perspective schématisant différentes étapes du procédé de fabrication selon le second mode de réalisation préféré ;  FIGS. 6a to 6d show perspective views schematizing different steps of the manufacturing method according to the second preferred embodiment;
les figures 7a et 7b sont des vues en perspective et de face d'un réflecteur destiné à être obtenu selon un troisième mode de réalisation préféré du procédé de fabrication selon l'invention ; et  Figures 7a and 7b are perspective and front views of a reflector to be obtained according to a third preferred embodiment of the manufacturing method according to the invention; and
les figures 8a et 8b représentent des vues en perspective schématisant différentes étapes du procédé de fabrication selon le troisième mode de réalisation préféré.  Figures 8a and 8b show perspective views schematically showing different steps of the manufacturing method according to the third preferred embodiment.
EXPOSÉ DÉ TAILLÉ DE MODES DE RÉALISATION PARTICULIERS  DETAILED DESCRIPTION OF PARTICULAR EMBODIMENTS
En référence tout d'abord aux figures la à le, on peut voir un système 1 comprenant un capteur solaire 2 ainsi qu'un champ de réflecteurs 4 concentrant le rayonnement solaire sur le capteur. Le champ 4, par exemple du type Fresnel, comprend une rangée de réflecteurs 6 agencés côte à côte. Comme cela sera détaillé ci-après, chaque réflecteur 6 comprend un miroir assemblé sur une structure de support, celle-ci étant montée pivotante sur un bâti 8. Les axes de rotation 10 des réflecteurs sont préférentiellement parallèles. Leur pilotage en rotation peut être indépendant ou dépendant, et commandé de manière à concentrer au mieux le rayonnement solaire sur le capteur 2. A cet égard, les figures la à le montrent trois configurations distinctes dans lesquelles les rayons lumineux incidents 12 ont des orientations différentes, chaque configuration étant associée à un calage en rotation particulier de l'ensemble des réflecteurs du champ 4, permettant d'orienter au mieux les rayons réfléchis 14 sur le capteur 2. Referring firstly to Figures la to le, we can see a system 1 comprising a solar collector 2 and a field of reflectors 4 concentrating the solar radiation on the sensor. The Field 4, for example of the Fresnel type, comprises a row of reflectors 6 arranged side by side. As will be detailed below, each reflector 6 comprises a mirror assembled on a support structure, the latter being pivotally mounted on a frame 8. The axes of rotation 10 of the reflectors are preferably parallel. Their rotation control may be independent or dependent, and controlled in such a way as to best focus the solar radiation on the sensor 2. In this respect, the figures 1a to 3 show three distinct configurations in which the incident light rays 12 have different orientations. each configuration being associated with a particular rotational setting of all the reflectors of the field 4, making it possible to orient the reflected rays 14 on the sensor 2 as well as possible.
Il s'agit de préférence d'un capteur dit de haut flux, pour applications variées, par exemple chauffage d'un fluide caloporteur de type eau, huile ou sel fondu, ou encore pour le domaine photovoltaïque à concentration. Sa puissance est comprise entre plusieurs dizaines de kW/m2 et quelques MW/m2. Chaque réflecteur 6, de forme globale rectangulaire, présente une surface de plusieurs mètres carré. La précision généralement requise sur ce type de système est de l'ordre 0,1° pour le calage angulaire des réflecteurs. It is preferably a so-called high flux sensor, for various applications, for example heating a heat transfer fluid of the water, oil or molten salt type, or for the photovoltaic field with concentration. Its power is between several tens of kW / m 2 and some MW / m 2 . Each reflector 6, of rectangular overall shape, has an area of several square meters. The precision generally required on this type of system is of the order of 0.1 ° for the angular setting of the reflectors.
En référence à présent aux figures 2a et 2b, on peut voir un réflecteur 6 du type de ceux utilisés dans le système 1 des figures précédentes, et destiné à être obtenu selon un premier mode de réalisation préféré du procédé de fabrication selon 1 ' invention . Referring now to Figures 2a and 2b, we can see a reflector 6 of the type used in the system 1 of the preceding figures, and intended to be obtained according to a first mode of preferred embodiment of the manufacturing method according to the invention.
Le réflecteur 6 comporte tout d'abord un miroir 16, de forme non plane, réalisé en verre sur une épaisseur de l'ordre de 4 mm, et typiquement comprise entre 0,1 et 7 mm. Sa forme est ici à simple courbure. Néanmoins, d'autres formes peuvent être envisagées, sans sortir du cadre de l'invention.  The reflector 6 comprises first of all a mirror 16, of non-planar shape, made of glass on a thickness of about 4 mm, and typically between 0.1 and 7 mm. Its shape here is simple curvature. Nevertheless, other forms may be envisaged, without departing from the scope of the invention.
Il comprend aussi une structure de support 18, par exemple de forme grossièrement parallélépipédique, pleine ou creuse. Elle peut être réalisée en acier, avec de grandes tolérances de fabrication. Elle présente des moyens permettant la rotation du réflecteur selon l'axe 10, ici des pions de rotation 19.  It also comprises a support structure 18, for example of roughly parallelepiped shape, solid or hollow. It can be made of steel, with high manufacturing tolerances. It has means allowing the rotation of the reflector along the axis 10, here rotation pins 19.
La liaison mécanique entre la structure de support 18 et le miroir 16 ne se fait pas sur toute la surface interne de ce dernier, mais à l'aide d'une pluralité d'éléments de jonction 20 interposés entre le miroir et la structure, en étant solidarisés à ceux-ci. Ces éléments, rigides, sont de préférence métalliques, mais pourraient alternativement être en céramique ou en matériau polymère. La solidarisation s'effectue ici préférentiellement par collage, même si d'autres moyens conventionnels peuvent être employés, sans sortir du cadre de l'invention. Bien évidemment, dans le cas de l'emploi d'une colle en matériau polymère et d'éléments de jonction en matériau polymère, les deux matériaux polymères utilisés sont différents.  The mechanical connection between the support structure 18 and the mirror 16 does not occur over the entire internal surface of the latter, but with the aid of a plurality of connecting elements 20 interposed between the mirror and the structure, being attached to them. These rigid elements are preferably metallic, but could alternatively be ceramic or polymeric material. Bonding is preferably carried out here by gluing, even if other conventional means can be used, without departing from the scope of the invention. Of course, in the case of the use of a polymer material adhesive and joining elements of polymer material, the two polymeric materials used are different.
Ces éléments 20 sont allongés, par exemple des piges ou barreaux, logés dans des orifices correspondants 22 pratiqués traversants sur la structure de support 18. Dans la position des figures 2a et 2b, l'extrémité supérieure des piges 20 est collée sur la face interne du miroir, tandis que la partie de la surface latérale logée dans la structure 18 est collée sur la partie de la surface latérale en regard de l'orifice correspondant 22. These elements 20 are elongated, for example pegs or bars, housed in orifices 22 in the position of FIGS. 2a and 2b, the upper end of the rods 20 is glued to the internal face of the mirror, whereas the part of the lateral surface accommodated in the structure 18 is glued on the part of the lateral surface facing the corresponding orifice 22.
Les piges 20 sont par exemple réalisées dans un alliage à base d'aluminium, tandis que la colle employée peut être du type colle pâteuse polyuréthane mono-composant, par exemple de la colle vendue par la société 3M sous la référence « Polyuréthane Adhesive Sealant 560 ». Un autre exemple est la colle vendue par la société Hutchinson/l f sous la référence « PR1440 ». La viscosité de la colle choisie est préférentiellement suffisante pour rester localisée au niveau de la liaison entre les éléments de jonction et le miroir et/ou la structure arrière.  The pegs 20 are for example made of an aluminum-based alloy, while the adhesive used may be of the pasty polyurethane glue single-component type, for example glue sold by the company 3M under the reference "Polyurethane Adhesive Sealant 560 ". Another example is the glue sold by the company Hutchinson / l under the reference "PR1440". The viscosity of the chosen adhesive is preferably sufficient to remain localized at the level of the connection between the connecting elements and the mirror and / or the rear structure.
La colle est choisie, plus particulièrement, parmi les colles ayant après séchage un modèle de Young compris entre 2 et 60 MPa, et une dureté comprise entre 20 et 60 shore A.  The glue is chosen, more particularly, from the glues having, after drying, a Young model of between 2 and 60 MPa, and a hardness of between 20 and 60 shore A.
Alternativement, pour coller l'extrémité des piges 20 sur le miroir, il peut s'agir d'un scotch double-face.  Alternatively, to glue the end of pegs 20 on the mirror, it may be a double-sided tape.
Grâce à la rigidité conférée par les piges 20, le miroir maintenu en forme par celles-ci présente des propriétés optiques très satisfaisantes. Naturellement, plus le miroir sera intrinsèquement souple, plus le nombre d'éléments de jonction à prévoir sera élevé. Pour sa fabrication schématisée en référence aux figures 3a à 4c, il est tout d'abord réalisé une étape de mise en position du miroir 16 par rapport à la structure de support 18, non-équipée des piges 20. Due to the rigidity imparted by rods 20, the mirror maintained in shape by them has very satisfactory optical properties. Naturally, the more the mirror will be intrinsically flexible, the more the number of junction elements to predict will be high. For its manufacture schematized with reference to FIGS. 3a to 4c, it is first of all carried out a step of placing the mirror 16 in position relative to the support structure 18, which is not equipped with the pins 20.
Pour ce faire, le miroir est tout d'abord mis en forme sur un moule 30, puis solidarisé à ce dernier de façon temporaire, par exemple à l'aide d'un adhésif conventionnel, ou par tirage au vide. C'est le moule 30 qui applique donc provisoirement la forme définitive au miroir 16.  To do this, the mirror is first shaped on a mold 30, then secured to the latter temporarily, for example using a conventional adhesive, or by vacuum drawing. It is the mold 30 which therefore temporarily applies the final shape to the mirror 16.
Il est ensuite opéré une étape de mise en position du miroir 16 par rapport à la structure arrière 18, par déplacement relatif entre l'ensemble constitué du moule 30 portant le miroir, et la structure 18. Concrètement, la structure de support est placée immobile dans un repère connu, dans lequel l'ensemble moule/miroir se déplace verticalement vers le haut en direction de cette structure, comme cela a été schématisé par la flèche 32 sur les figures 3a et 4a. A la fin de cette étape de mise en position du miroir 16, celui-ci se retrouve en regard et à distance de la structure 18, aucun contact n'étant préférentiellement observé à ce stade entre ces deux éléments adoptant leur position relative définitive.  It is then carried out a positioning step of the mirror 16 relative to the rear structure 18, by relative displacement between the assembly consisting of the mold 30 carrying the mirror, and the structure 18. In concrete terms, the support structure is placed motionless in a known reference frame, in which the mold / mirror assembly moves vertically upwards in the direction of this structure, as shown schematically by the arrow 32 in FIGS. 3a and 4a. At the end of this step of positioning the mirror 16, it is found opposite and away from the structure 18, no contact being preferentially observed at this stage between these two elements adopting their final relative position.
Il est ensuite opéré une étape d'ajustement des piges 20. Pour ce faire, comme cela a été schématisé sur les figures 3b et 4b, ces piges 20 sont introduites par le haut dans leurs orifices respectifs 22, puis coulissent vers le bas par gravité dans ces mêmes orifices, avant d'être stoppées par prise d'appui contre la surface interne du miroir 16. Bien entendu, la course de coulissement n'est pas la même pour chaque pige 22, cette course étant fonction de 1 ' éloignement entre le miroir et la surface 34 en regard de la structure arrière 18. Il est par ailleurs noté que cette surface 34 peut être réalisée avec des grandes tolérances, sans que cela ne soit pré udiciable au maintien en forme du miroir, puisque ce dernier est porté directement par les piges, et non par cette surface 34 de laquelle ces piges font saillie. An adjustment step of the pins 20 is then performed. To do this, as has been schematized in FIGS. 3b and 4b, these rods 20 are introduced from above into their respective orifices 22, then slide down by gravity. in these same holes, before being stopped by taking support against the internal surface of the mirror 16. Of course, the sliding stroke is not the same for each pin 22, this stroke being a function of the distance between the mirror and the surface 34 facing the rear structure 18. It it is furthermore noted that this surface 34 can be made with large tolerances, without this being pre-usable for maintaining the shape of the mirror, since the latter is carried directly by the pins, and not by this surface 34 of which these rods protrude.
Dans ce premier mode de réalisation préféré, à la fin de l'étape d'ajustement où les piges 20 adoptent leur position de solidarisation correspondant à leur position définitive par rapport au miroir et à la structure de support, ces piges sont maintenues par gravité en appui contre le miroir. Ensuite, ces piges 20 sont collées au miroir et à la structure de support 18, comme schématisé sur les figures 3c et 4c sur lesquelles les parties grisées 36, 38 correspondent à de la colle. Si ces piges ont été préalablement encollées avant leur introduction dans les orifices 22 de la structure 18, il suffit alors d'observer un simple temps de séchage pour obtenir le durcissement de cette colle.  In this first preferred embodiment, at the end of the adjustment step where the rods 20 adopt their securing position corresponding to their final position relative to the mirror and the support structure, these pins are maintained by gravity support against the mirror. Then, these pegs 20 are bonded to the mirror and the support structure 18, as shown schematically in Figures 3c and 4c on which the gray portions 36, 38 correspond to glue. If these rods were previously glued before their introduction into the orifices 22 of the structure 18, then simply observe a simple drying time to obtain the hardening of this glue.
En référence à présent aux figures 5a et Referring now to FIGS. 5a and
5b, on peut voir un autre réflecteur 6 du type de ceux utilisés dans le système 1 des figures la à le, et destiné à être obtenu selon un second mode de réalisation préféré du procédé de fabrication selon l'invention. Le réflecteur 6 comporte tout d'abord un miroir 16, de forme non plane, réalisé en verre sur une épaisseur de l'ordre de 4 mm. Sa forme est ici à simple courbure, très peu prononcée. Néanmoins, d'autres formes peuvent être envisagées, sans sortir du cadre de 1 ' invention . 5b, we can see another reflector 6 of the type used in the system 1 of Figures la to le, and intended to be obtained according to a second preferred embodiment of the manufacturing method according to the invention. The reflector 6 comprises first a mirror 16, of non-planar shape, made of glass to a thickness of about 4 mm. Its shape here is simple curvature, very little pronounced. Nevertheless, other forms can be envisaged without departing from the scope of the invention.
Il comprend aussi une structure de support 18, par exemple réalisée à partir d'un cylindre 136 à partir duquel des nervures globalement triangulaires 138 font saillie. Ces nervures 138, espacées le long du cylindre 136 et orthogonales à ce dernier, ont leurs extrémités reliées par deux longerons sensiblement plans 140. Cette structure 18 peut être réalisée en acier, avec de grandes tolérances de fabrication. Elle présente des moyens permettant la rotation du réflecteur selon l'axe 10, ici des pions de rotation 19 constitués par les deux extrémités du cylindre 136.  It also comprises a support structure 18, for example made from a cylinder 136 from which generally triangular ribs 138 project. These ribs 138, spaced along the cylinder 136 and orthogonal to the latter, have their ends connected by two substantially planar longitudinal members 140. This structure 18 may be made of steel, with large manufacturing tolerances. It has means for rotating the reflector along the axis 10, here rotating pins 19 constituted by the two ends of the cylinder 136.
La liaison mécanique entre la structure de support 18 et le miroir 16 ne se fait pas sur toute la surface interne de ce dernier, mais à l'aide d'une pluralité d'éléments de jonction métalliques 120 interposés entre le miroir et les éléments de structure 138, 140, en étant solidarisés à ceux-ci. La solidarisation s'effectue ici préférentiellement par collage, même si d'autres moyens conventionnels peuvent être employés sans sortir du cadre de l'invention.  The mechanical connection between the support structure 18 and the mirror 16 is not made over the entire internal surface of the latter, but with the aid of a plurality of metallic joining elements 120 interposed between the mirror and the elements of the structure 138, 140, being secured to them. Bonding is preferably done here by gluing, even if other conventional means can be employed without departing from the scope of the invention.
Comme cela sera plus détaillé ci-après, les éléments 120 sont des profilés de section en forme globale de T dont la base de chacun d' eux est doublée de manière à laisser apparaître entre les deux bases un espace pénétré par une partie de glissement les éléments de structure 138, 140. As will be more detailed below, the elements 120 are T-shaped overall section sections whose base of each of them is doubled so as to show between the two bases a space penetrated by a sliding part the structural elements 138, 140.
Dans la position de la figure 5a, l'extrémité inférieure des profilés 120, correspondant à la tête du T, est collée sur la face interne du miroir, dite face non-réfléchissante, tandis que la base double du T qui enserre la partie de glissement de son élément de structure correspondant 138, 140 est également collée à cette partie de glissement.  In the position of Figure 5a, the lower end of the profiles 120, corresponding to the head of the T, is bonded to the inner face of the mirror, said non-reflecting face, while the double base of the T which encloses the part of sliding of its corresponding structural element 138, 140 is also bonded to this sliding part.
Les profilés 120 sont par exemple réalisés dans un alliage à base d'aluminium, tandis que la colle employée peut être du type colle pâteuse polyuréthane mono-composant, par exemple de la colle vendue par la société 3M sous la référence « Polyuréthane Adhesive Sealant 560 ». Alternativement, pour coller l'extrémité des profilés 120 sur le miroir, il peut s'agir d'un scotch double-face. Avantageusement, la colle employée présente une certaine souplesse, au contraire des éléments de jonction plus rigides, ce qui permet de diminuer les contraintes mécaniques subies par le miroir et/ou d'absorber les chocs occasionnés par les intempéries .  The profiles 120 are for example made of an aluminum-based alloy, while the adhesive used may be of the pasty type polyurethane single-component glue, for example glue sold by 3M under the reference "Polyurethane Adhesive Sealant 560 ". Alternatively, to glue the end of the profiles 120 on the mirror, it may be a double-sided tape. Advantageously, the glue employed has a certain flexibility, unlike the more rigid junction elements, which makes it possible to reduce the mechanical stresses to which the mirror is subjected and / or to absorb shocks caused by the weather.
Grâce à la rigidité conférée par les profilés métalliques 120, le miroir maintenu en forme par ceux-ci présente des propriétés optiques très satisfaisantes .  Due to the rigidity conferred by the metal profiles 120, the mirror maintained in shape by them has very satisfactory optical properties.
Pour sa fabrication schématisée en référence aux figures 6a à 6d, le miroir 16 est tout d'abord mis en forme sur un moule 30, puis solidarisé à ce dernier de façon temporaire, par exemple à l'aide d'un adhésif conventionnel. Cette étape est schématisée sur la figure 6a. C'est le moule 30 qui applique donc provisoirement la forme définitive au miroir 16. For its manufacture shown schematically with reference to FIGS. 6a to 6d, the mirror 16 is first shaped on a mold 30, then secured to the latter temporarily, for example using a conventional adhesive. This step is schematized in Figure 6a. It is the mold 30 which therefore temporarily applies the final shape to the mirror 16.
Ensuite, il est procédé au montage des profilés 120 sur les éléments de structure 138, 140. Comme évoqué ci-dessus, la figure 6b montre que chaque profilé 120 présente une section en forme globale de T dont la base de chacun d' eux est doublée de manière à laisser apparaître entre les deux bases parallèles 142a, 142b un espace 144.  Then, the profiles 120 are mounted on the structural elements 138, 140. As mentioned above, FIG. 6b shows that each section 120 has a section of overall T shape, the base of each of which is doubled so as to reveal between the two parallel bases 142a, 142b a space 144.
Pour réaliser le montage, chaque profilé To realize the assembly, each profile
120 vient pincer une partie de glissement de son élément de structure correspondant 138, 140, cette partie de glissement pénétrant en effet dans l'espace 144, entre les deux bases parallèles 142a, 142b, sur toute la longueur du profilé 120. 120 has pinched a sliding part of its corresponding structural element 138, 140, this sliding part actually penetrating in the space 144, between the two parallel bases 142a, 142b, over the entire length of the profile 120.
Après montage de tous les profilés 120 sur la structure 18, par pincement, il est obtenu l'ensemble montré sur la figure 6c.  After assembly of all the profiles 120 on the structure 18, by pinching, the assembly shown in FIG. 6c is obtained.
Il est ensuite opéré une étape de mise en position du miroir 16 par rapport à la structure arrière 18, par déplacement relatif entre l'ensemble constitué du moule 30 portant le miroir, et la structure 18. Concrètement, la structure de support est placée immobile dans un repère connu, dans lequel l'ensemble moule/miroir se déplace verticalement vers le haut en direction de cette structure, comme cela a été schématisé par la flèche 32 sur la figure 6d. A la fin de cette étape de mise en position du miroir 16, celui-ci se retrouve en regard et à distance de la structure 18, ces deux éléments adoptant alors leur position relative définitive. L'une des particularités de ce second mode de réalisation préféré réside dans le fait qu'une étape d'ajustement des profilés 120 s'effectue au moins en partie automatiquement durant l'étape précédemment décrite de mise en position du miroir, représentée sur la figure 6d. It is then carried out a positioning step of the mirror 16 relative to the rear structure 18, by relative displacement between the assembly consisting of the mold 30 carrying the mirror, and the structure 18. In concrete terms, the support structure is placed motionless in a known reference frame, in which the mold / mirror assembly moves vertically upwards in the direction of this structure, as shown schematically by the arrow 32 in FIG. 6d. At the end of this step of positioning the mirror 16, it is found opposite and at a distance from the structure 18, these two elements then adopting their final relative position. One of the peculiarities of this second preferred embodiment lies in the fact that a step of adjusting the profiles 120 is performed at least partly automatically during the previously described step of positioning the mirror, shown in FIG. Figure 6d.
En effet, au cours du déplacement relatif entre le miroir 16 et la structure 18, la tête 146 des profilés 120 arrive en appui contre la surface interne du miroir, et la poursuite de ce déplacement conduit à un glissement des parties de glissement 138a des éléments de structures 138, 140, dans l'espace 144 de leurs profilés respectifs.  Indeed, during the relative displacement between the mirror 16 and the structure 18, the head 146 of the profiles 120 abuts against the internal surface of the mirror, and the continuation of this displacement leads to a sliding of the sliding parts 138a of the elements. structures 138, 140, in the space 144 of their respective profiles.
Ici, c'est donc l'appui contre le miroir et la poursuite du déplacement relatif entre ce dernier et la structure arrière qui conduisent au glissement des profilés 120 relativement à cette structure arrière. Le caractère automatique du déplacement est naturellement avantageux en ce qu'il simplifie la mise en œuvre du procédé.  Here, it is therefore the support against the mirror and the continuation of the relative displacement between the latter and the rear structure which lead to the sliding of the profiles 120 relative to this rear structure. The automatic nature of the displacement is naturally advantageous in that it simplifies the implementation of the method.
Bien entendu, le glissement n'est pas le même pour chaque profilé 120, ni forcement identique en chaque point du profilé. D'ailleurs, comme cela est le mieux visible sur la figure 6d, les bases parallèles 142a, 142b peuvent être équipées de rainures 150 espacées longitudinalement les unes des autres afin de conférer une souplesse aux profilés dans cette même direction longitudinale, durant leur étape d'a ustement. Cette souplesse du profilé permet en outre de ne pas imprimer en négatif la tête plane 146 des profilés sur le miroir, ce qui pourrait altérer les propriétés du miroir. Of course, the slip is not the same for each profile 120, nor necessarily identical at each point of the profile. Moreover, as is best seen in Figure 6d, the parallel bases 142a, 142b can be equipped with grooves 150 spaced longitudinally from each other to give flexibility to the profiles in the same longitudinal direction, during their step d ustement. This flexibility of the profile also makes it possible not to print in negative the flat head 146 profiles on the mirror, which could alter the properties of the mirror.
Additionnement , les rainures 150 permettent de favoriser l'évacuation de la colle ajoutée en surplus, ainsi que le séchage de la colle mise en œuvre dans le cadre du procédé.  Additionnement, the grooves 150 make it possible to promote the evacuation of the glue added in surplus, as well as the drying of the glue implemented in the context of the process.
L'étendue du glissement est donc fonction de 1 ' éloignement entre le miroir et les arêtes des éléments 138, 140 en regard de ce miroir. Il est par ailleurs noté que ces arêtes peuvent être réalisées avec des grandes tolérances, sans que cela ne soit pré udiciable au maintien en forme du miroir, puisque ce dernier est porté directement par la tête 146 des profilés 120, et non par ces arêtes logées dans le espaces inter-bases 140 des profilés.  The extent of the sliding is therefore a function of the distance between the mirror and the edges of the elements 138, 140 opposite this mirror. It is also noted that these edges can be made with large tolerances, without this being pre-udiciable to maintain the shape of the mirror, since the latter is carried directly by the head 146 of the profiles 120, and not by these edges lodged in the inter-base spaces 140 of the profiles.
Le glissement précité peut être poursuivi après l'étape de mise en position du miroir, par exemple pour améliorer l'appui des têtes 146 contre le miroir, et/ou, le cas échéant, enlever la colle en surplus des profilés 120 qui ont été préalablement encollés. Cela peut s'effectuer manuellement, ou de manière automatisée.  The aforementioned sliding can be continued after the step of placing the mirror in position, for example to improve the support of the heads 146 against the mirror, and / or, where appropriate, to remove the surplus glue from the profiles 120 which have been previously glued. This can be done manually, or automatically.
Après cette démarche optionnelle, l'étape d'ajustement des profilés 120 est achevée, et ces derniers occupent alors leur position de solidarisation correspondant à leur position définitive par rapport au miroir et à la structure de support, ces profilés étant toujours maintenus par pincement sur les éléments de structure 138, 140. Ensuite, les profilés 120 sont collés au miroir et à la structure de support 18. Dans le cas éventuel où les profilés ont été préalablement encollés avant leur assemblage sur les éléments de structure 138, 140, il suffit alors d'observer un simple temps de séchage pour obtenir le durcissement de cette colle. After this optional step, the step of adjusting the profiles 120 is completed, and they then occupy their position of attachment corresponding to their final position with respect to the mirror and the support structure, these profiles being always held by pinching on the structural elements 138, 140. Then, the profiles 120 are glued to the mirror and to the support structure 18. In the event that the profiles have been previously glued before assembly on the structural elements 138, 140, then simply observe a simple drying time to obtain the hardening of this glue.
En référence à présent aux figures 7a et Referring now to Figures 7a and
7b, on peut voir un autre réflecteur 6 du type de ceux utilisés dans le système 1 des figures la à le, et destiné à être obtenu selon un troisième mode de réalisation préféré du procédé de fabrication selon l'invention. 7b, we can see another reflector 6 of the type used in the system 1 of Figures la to le, and to be obtained according to a third preferred embodiment of the manufacturing method according to the invention.
Le réflecteur 6 comporte tout d'abord un miroir 16, de forme non plane, réalisé en verre sur une épaisseur de l'ordre de 4 mm. Sa forme est ici à simple courbure, très peu prononcée. Néanmoins, d'autres formes peuvent être envisagées, sans sortir du cadre de 1 ' invention .  The reflector 6 comprises first a mirror 16, of non-planar shape, made of glass to a thickness of about 4 mm. Its shape here is simple curvature, very little pronounced. Nevertheless, other forms can be envisaged without departing from the scope of the invention.
Il comprend aussi une structure de support 18, par exemple réalisée à partir d'un cylindre 136 à partir duquel des nervures globalement triangulaires 138 font saillie. Ces nervures 138 sont espacées le long du cylindre 136 et orthogonales à ce dernier. Cette structure 18 peut être réalisée en acier, avec de grandes tolérances de fabrication. Elle présente des moyens permettant la rotation du réflecteur selon l'axe 10, ici des pions de rotation 19 constitués par les deux extrémités du cylindre 136.  It also comprises a support structure 18, for example made from a cylinder 136 from which generally triangular ribs 138 project. These ribs 138 are spaced along the cylinder 136 and orthogonal to the latter. This structure 18 can be made of steel, with high manufacturing tolerances. It has means for rotating the reflector along the axis 10, here rotating pins 19 constituted by the two ends of the cylinder 136.
La liaison mécanique entre la structure de support 18 et le miroir 16 ne se fait pas sur toute la surface interne de ce dernier, mais à l'aide d'une pluralité d'éléments de jonction métalliques 220 interposés entre le miroir et les nervures 138, en étant solidarisés à ceux-ci. La solidarisation s'effectue ici préférentiellement par collage au niveau du miroir et par vissage au niveau de la structure de support 18, même si d'autres moyens conventionnels peuvent être employés sans sortir du cadre de 1 ' invention . The mechanical connection between the support structure 18 and the mirror 16 does not occur over the entire internal surface of the latter, but with the aid of a plurality of metal connecting elements 220 interposed between the mirror and the ribs 138. , in being attached to them. The fastening is preferably carried out here by gluing at the mirror and by screwing at the level of the support structure 18, even if other conventional means can be used without departing from the scope of the invention.
Comme cela sera plus détaillé ci-après, les éléments de jonction métalliques 220 sont des pattes présentant une tête d'appui sur le miroir, ainsi qu'un corps relié à la structure de support par une liaison glissière formée par une rainure traversée par au moins deux vis.  As will be more detailed below, the metal joining elements 220 are tabs having a bearing head on the mirror, and a body connected to the support structure by a sliding connection formed by a groove through which the minus two screws.
Dans la position de la figure 7a, l'extrémité inférieure des pattes 220, correspondant à la tête d'appui, est collée sur la face interne du miroir, tandis que le corps des pattes est solidarisé par vissage sur les nervures 138.  In the position of FIG. 7a, the lower end of the tabs 220, corresponding to the bearing head, is glued to the inner face of the mirror, while the body of the tabs is screwed onto the ribs 138.
Les pattes 220 sont par exemple réalisées dans un alliage à base d'aluminium, tandis que la colle employée peut être du type colle pâteuse polyuréthane mono-composant, par exemple de la colle vendue par la société 3M sous la référence « Polyuréthane Adhesive Sealant 560 ». Alternativement, pour coller l'extrémité des profilés 120 sur le miroir, il peut s'agir d'un scotch double-face. Les vis sont quant à elle préférentiellement réalisées en acier.  The tabs 220 are for example made of an aluminum-based alloy, while the adhesive used may be of the one-component polyurethane pasty glue type, for example glue sold by the company 3M under the reference "Polyurethane Adhesive Sealant 560 ". Alternatively, to glue the end of the profiles 120 on the mirror, it may be a double-sided tape. The screws are in turn preferably made of steel.
Grâce à la rigidité conférée par les pattes métalliques 220, le miroir maintenu en forme par celles-ci présente des propriétés optiques très satisfaisantes. Pour sa fabrication schématisée en référence aux figures 8a et 8b, le miroir 16 est tout d'abord mis en forme sur un moule 30, puis solidarisé à ce dernier de façon temporaire, par exemple à l'aide d'un adhésif conventionnel. C'est le moule 30 qui applique donc provisoirement la forme définitive au miroir 16. Thanks to the rigidity conferred by the metal tabs 220, the mirror maintained in shape by them has very satisfactory optical properties. For its manufacture schematized with reference to Figures 8a and 8b, the mirror 16 is first shaped on a mold 30, and then secured to the latter temporarily, for example using a conventional adhesive. It is the mold 30 which therefore temporarily applies the final shape to the mirror 16.
Ensuite, il est procédé au montage des pattes 220 sur les nervures 138. Comme évoqué ci- dessus, la figure 8a montre que chaque patte 220 présente une tête d'appui 250 destinée à être appliquée contre le miroir, ainsi qu'un corps vertical 252 portant cette tête.  Then, the tabs 220 are mounted on the ribs 138. As mentioned above, FIG. 8a shows that each leg 220 has a bearing head 250 intended to be applied against the mirror, as well as a vertical body. 252 bearing this head.
Le corps est pourvu d'une rainure droite verticale 254 traversée par deux vis 256 appartenant à des boulons, ces vis étant logées dans des trous de passage (non représentés) des nervures 138.  The body is provided with a vertical straight groove 254 traversed by two screws 256 belonging to bolts, these screws being housed in passage holes (not shown) of the ribs 138.
Pour réaliser le montage, les vis 256 sont mises en place à travers les trous de passage et à travers les rainures 254, puis les écrous associés sont vissés aux extrémités de ces vis.  To perform the assembly, the screws 256 are put in place through the through holes and through the grooves 254, and the associated nuts are screwed to the ends of these screws.
Après montage de toutes les pattes 220, celles-ci sont retenues par appui de la vis la plus haute contre l'extrémité haute de la rainure 254, comme montré sur la figure 8a. Les écrous peuvent être serrés de manière à appliquer une force de friction entre les pattes 252 et les nervures 138, sans pour autant interdire le déplacement relatif entre les deux selon la hauteur, nécessaire à la réussite de l'étape ultérieure qui va à présent être décrite. Effectivement, il est ensuite opéré une étape de mise en position du miroir 16 par rapport à la structure arrière 18, par déplacement relatif entre l'ensemble constitué du moule 30 portant le miroir, et la structure 18. Concrètement, la structure de support est placée immobile dans un repère connu, dans lequel l'ensemble moule/miroir se déplace verticalement vers le haut en direction de cette structure, comme cela a été schématisé par la flèche 32 sur la figure 8b. A la fin de cette étape de mise en position du miroir 16, celui-ci se retrouve en regard et à distance de la structure 18, ces deux éléments adoptant alors leur position relative définitive. After assembly of all the tabs 220, they are retained by pressing the highest screw against the upper end of the groove 254, as shown in Figure 8a. The nuts can be tightened so as to apply a friction force between the tabs 252 and the ribs 138, without prohibiting the relative displacement between the two according to the height, necessary for the success of the subsequent step which will now be described. Effectively, it is then carried out a positioning step of the mirror 16 relative to the rear structure 18, by relative displacement between the assembly consisting of the mold 30 carrying the mirror, and the structure 18. In concrete terms, the support structure is stationary in a known reference frame, in which the mold / mirror assembly moves vertically upwards towards this structure, as shown schematically by the arrow 32 in FIG. 8b. At the end of this step of positioning the mirror 16, it is found opposite and at a distance from the structure 18, these two elements then adopting their final relative position.
L'une des particularités de ce troisième mode de réalisation préféré réside dans le fait qu'une étape d'ajustement des pattes 220 s'effectue au moins en partie automatiquement durant l'étape précédemment décrite de mise en position du miroir, représentée sur la figure 8b.  One of the peculiarities of this third preferred embodiment lies in the fact that a tab adjustment step 220 is performed at least partially automatically during the previously described step of positioning the mirror, shown in FIG. Figure 8b.
En effet, au cours du déplacement relatif entre le miroir 16 et la structure 18, la tête d'appui 250 des pattes 220 arrive en appui contre la surface interne du miroir, et la poursuite de ce déplacement conduit à un déplacement relatif des pattes 220 par rapport aux nervures 136, autorisé grâce au coulissement des vis 256 dans les rainures 254. Il est fait en sorte que le diamètre des vis soit sensiblement identique à la largeur de la rainure, de manière à imposer un seul degré de liberté à chaque patte 220, correspondant à celui du coulissement précité. La liaison mécanique réalisée constitue ainsi une glissière . Indeed, during the relative displacement between the mirror 16 and the structure 18, the support head 250 of the tabs 220 bears against the inner surface of the mirror, and the continuation of this movement leads to a relative movement of the tabs 220 relative to the ribs 136, authorized by the sliding of the screws 256 in the grooves 254. It is arranged so that the diameter of the screws is substantially identical to the width of the groove, so as to impose a single degree of freedom to each leg 220, corresponding to that of the aforementioned sliding. The mechanical linkage thus constitutes a slide.
C'est donc l'appui contre le miroir et la poursuite du déplacement relatif entre ce dernier et la structure arrière qui conduisent au coulissement des pattes 220 relativement à cette structure arrière. Le caractère automatique du déplacement est naturellement avantageux en ce qu'il simplifie la mise en œuvre du procédé .  It is therefore the support against the mirror and the continuation of the relative displacement between the latter and the rear structure which lead to the sliding of the legs 220 relative to this rear structure. The automatic nature of the displacement is naturally advantageous in that it simplifies the implementation of the method.
Bien entendu, le coulissement n'est pas le même pour chaque patte 220. L'étendue du coulissement est fonction de 1 ' éloignement entre le miroir et les arêtes des nervures 138 en regard de ce miroir. Ces nervures peuvent donc être réalisées avec des grandes tolérances, sans que cela ne soit pré udiciable au maintien en forme du miroir, puisque ce dernier est porté directement par la tête 250 des pattes 220, et non par les nervures 138.  Of course, the sliding is not the same for each leg 220. The extent of the sliding is a function of 1 'distance between the mirror and the edges of the ribs 138 facing this mirror. These ribs can therefore be made with large tolerances, without this being pre-usable for maintaining the shape of the mirror, since the latter is carried directly by the head 250 of the tabs 220, and not by the ribs 138.
Le coulissement précité peut être poursuivi après l'étape de mise en position du miroir, par exemple pour améliorer l'appui des têtes 250 contre le miroir, et/ou, le cas échéant, enlever la colle en surplus des pattes 220 qui ont été préalablement encollées. Cela peut s'effectuer manuellement, ou de manière automatisée.  The aforementioned sliding can be continued after the step of placing the mirror in position, for example to improve the support of the heads 250 against the mirror, and / or, where appropriate, to remove the surplus glue of the legs 220 which have been previously glued. This can be done manually, or automatically.
Après cette démarche optionnelle, l'étape d'ajustement des pattes 220 est achevée, et ces dernières occupent alors leur position de solidarisation correspondant à leur position définitive par rapport au miroir et à la structure de support, ces pattes étant toujours maintenues par les boulons. Ensuite, ces pattes 220 sont collées sur le miroir. Dans le cas éventuel où elles ont été préalablement encollées avant leur assemblage sur nervures 138, il suffit alors d'observer un simple temps de séchage pour obtenir le durcissement de cette colle. After this optional step, the leg adjustment step 220 is completed, and the latter then occupy their securing position corresponding to their final position with respect to the mirror and the support structure, these legs being always held by the bolts. . Then, these tabs 220 are glued on the mirror. In the event that they have been previously glued before their assembly on ribs 138, it is then sufficient to observe a simple drying time to obtain the hardening of this glue.
Du côté de la structure arrière 18, les boulons sont serrés de manière à interdire tout déplacement relatif entre les nervures 138 et les pattes 220. La solidarisation s'effectue donc ici par vissage. Ainsi, en cas de remplacement du miroir, il devient facile de réutiliser la structure 18 et ses pattes 220, par desserrage puis resserrage des boulons.  On the side of the rear structure 18, the bolts are tightened so as to prohibit any relative displacement between the ribs 138 and the tabs 220. The connection is therefore made here by screwing. Thus, in case of replacement of the mirror, it becomes easy to reuse the structure 18 and legs 220, by loosening and tightening the bolts.
Bien entendu, diverses modifications peuvent être apportées par l'homme du métier à l'invention qui vient d'être décrite, uniquement à titre d'exemples non limitatifs.  Of course, various modifications may be made by those skilled in the art to the invention which has just been described, solely by way of non-limiting examples.

Claims

REVENDICATIONS
1. Procédé de fabrication d'un réflecteur (6) comprenant un miroir (16) supporté par une structure de support (18), ledit procédé comprenant une étape de mise en position du miroir par rapport à ladite structure de support par déplacement relatif d'un moule (30) supportant le miroir, par rapport à ladite structure de support, A method of manufacturing a reflector (6) comprising a mirror (16) supported by a support structure (18), said method comprising a step of positioning the mirror relative to said support structure by relative displacement of a mold (30) supporting the mirror, with respect to said support structure,
caractérisé en ce qu'il comprend également une étape d'ajustement d'une pluralité d'éléments de jonction (20, 120, 220) entre le miroir et la structure de support, dans une position de solidarisation dans laquelle ils sont destinés à être solidarisés au miroir et à la structure de support, cette étape d'ajustement, réalisée durant ladite étape de mise en position du miroir et/ou après celle-ci, conduisant à un déplacement d' au moins certains des éléments de jonction relativement à ladite structure de support.  characterized in that it also comprises a step of adjusting a plurality of joining elements (20, 120, 220) between the mirror and the support structure, in a fastening position in which they are intended to be secured to the mirror and the support structure, this adjustment step, performed during said step of positioning the mirror and / or thereafter, leading to a displacement of at least some of the junction elements relative to said support structure.
2. Procédé de fabrication selon la revendication 1, dans lequel ladite étape d'ajustement, conduisant au déplacement d'au moins certains des éléments de jonction (120, 220) relativement à ladite structure de support (18), s'effectue au moins partiellement automatiquement durant ladite étape de mise en position du miroir (16), après appui des éléments de jonction concernés contre ledit miroir. The manufacturing method according to claim 1, wherein said adjusting step, leading to the displacement of at least some of the joining elements (120, 220) relative to said support structure (18), is carried out at least partially automatically during said positioning step of the mirror (16), after supporting the relevant connecting elements against said mirror.
3. Procédé de fabrication selon la revendication 1, dans lequel ladite étape d'ajustement, conduisant au déplacement d'au moins certains des éléments de jonction (20) relativement à ladite structure de support (18), s'effectue exclusivement après ladite étape de mise en position du miroir (16) . The manufacturing method according to claim 1, wherein said step of adjusting, leading to the displacement of at least some of the connecting elements (20) relative to said support structure (18), is carried out exclusively after said step of positioning the mirror (16).
4. Procédé de fabrication selon l'une quelconque des revendications précédentes, dans lequel lesdits éléments de jonction (20, 120, 220) sont destinés à être collés sur le miroir (16) . 4. Manufacturing method according to any one of the preceding claims, wherein said joining elements (20, 120, 220) are intended to be glued on the mirror (16).
5. Procédé de fabrication selon l'une quelconque des revendications précédentes, dans lequel lesdits éléments de jonction (20, 120, 220) sont destinés à être solidarisés sur la structure de support (18) par collage et/ou vissage et/ou soudage et/ou rivetage . 5. Manufacturing process according to any one of the preceding claims, wherein said connecting elements (20, 120, 220) are intended to be secured to the support structure (18) by gluing and / or screwing and / or welding and / or riveting.
6. Procédé de fabrication selon l'une quelconque des revendications précédentes, dans lequel lesdits éléments de jonction (20, 120, 220) sont destinés à être solidarisés par collage sur le miroir (16) et/ou sur la structure de support (18), lesdits éléments de jonction étant encollés avant la mise en œuvre de l'étape d'ajustement. 6. Manufacturing method according to any one of the preceding claims, wherein said junction elements (20, 120, 220) are intended to be secured by gluing on the mirror (16) and / or on the support structure (18). ), said connecting elements being glued before the implementation of the adjustment step.
7. Procédé de fabrication selon l'une quelconque des revendications précédentes, dans lequel lesdits éléments de jonction sont des éléments allongés (20) logés à coulissement dans des orifices correspondants (22) de la structure de support (18), lesdits éléments allongés étant introduits dans les orifices (22) avant leur appui contre le miroir. The manufacturing method as claimed in any one of the preceding claims, wherein said joining elements are elongate elements (20) slidably housed in corresponding orifices (22) of the support structure (18), said elongated elements being introduced into the orifices (22) before they bear against the mirror.
8. Procédé de fabrication selon la revendication 7, dans lequel à la fin de l'étape d'ajustement, lesdits éléments de jonction (20) allongés sont maintenus par gravité en appui contre le miroir (16), dans leur position de solidarisation . 8. Manufacturing process according to claim 7, wherein at the end of the adjustment step, said elongate junction elements (20) are held by gravity bearing against the mirror (16) in their position of attachment.
9. Procédé de fabrication selon l'une quelconque des revendications 1 à 6, dans lequel lesdits éléments de jonction sont des profilés (120) de section en forme globale de T dont la base de chacun d'eux est doublée de manière à laisser apparaître entre les deux bases (142a, 142b) un espace (144) pénétré par une partie de glissement (138a) de la structure de support (18), qui glisse dans cet espace (144) durant ladite étape de mise en position du miroir (16) . 9. Manufacturing process according to any one of claims 1 to 6, wherein said connecting elements are sections (120) of overall T-shaped section, the base of each of which is doubled so as to reveal between the two bases (142a, 142b) a space (144) penetrated by a sliding portion (138a) of the support structure (18), which slides in this space (144) during said positioning step of the mirror ( 16).
10. Procédé de fabrication selon la revendication 9, dans lequel chaque profilé (120) est monté sur la structure de support (18) avant la mise en œuvre de ladite étape de mise en position du miroir, par pincement de ladite partie de glissement (138a) de la structure de support correspondante (18), entre les deux bases du profilé (142a, 142b) . 10. Manufacturing process according to claim 9, wherein each profile (120) is mounted on the support structure (18) before the implementation of said step of positioning the mirror, by pinching said sliding portion ( 138a) of the corresponding support structure (18) between the two bases of the profile (142a, 142b).
11. Procédé de fabrication selon l'une quelconque des revendications 1 à 6, combiné à la revendication 2, dans lequel lesdits éléments de jonction sont des pattes (220) présentant une tête d'appui (250) sur le miroir (16), ainsi qu'un corps (252) relié à la structure de support (18) par une liaison glissière formée par une rainure (254) traversée par au moins deux vis (256) , et dans lequel, durant ladite étape d'ajustement, au moins certains des éléments de jonction (220) se déplacent automatiquement relativement à ladite structure de support (18) par déplacement des vis (256) dans la rainure (254), après appui des têtes d'appui (250) contre ledit miroir (16) . 11. Manufacturing method according to any one of claims 1 to 6, combined with claim 2, wherein said connecting elements are tabs (220) having a head bearing (250) on the mirror (16), and a body (252) connected to the support structure (18) by a sliding connection formed by a groove (254) traversed by at least two screws (256) and wherein, during said adjusting step, at least some of the joining elements (220) move automatically relative to said support structure (18) by moving the screws (256) in the groove (254) after pressing bearing heads (250) against said mirror (16).
12. Procédé de fabrication selon la revendication 11, dans lequel après ladite étape d'ajustement des éléments de jonction (220), ces derniers agencés en position de solidarisation sont solidarisés à la structure de support par vissage desdites vis (256) . 12. The manufacturing method according to claim 11, wherein after said step of adjusting the connecting elements (220), the latter arranged in the securing position are secured to the support structure by screwing said screws (256).
13. Procédé de fabrication selon l'une quelconque des revendications précédentes, dans lequel ledit miroir (16) n'est pas plan, et dans lequel ledit miroir (16) est réalisé à base de verre. 13. The manufacturing method according to any one of the preceding claims, wherein said mirror (16) is not plane, and wherein said mirror (16) is made of glass.
14. Procédé de fabrication selon l'une quelconque des revendications précédentes, dans lequel lesdits éléments de jonction (20, 120, 220) sont métalliques, en céramique, ou en matériau polymère. 14. The manufacturing method according to any one of the preceding claims, wherein said junction elements (20, 120, 220) are metallic, ceramic, or polymeric material.
15. Champ (4) de réflecteurs (6) chacun fabriqué selon un procédé défini dans l'une quelconque des revendications précédentes. 15. Field (4) reflectors (6) each manufactured according to a method defined in any one of the preceding claims.
16. Champ de réflecteurs selon la revendication 15, caractérisé en ce qu'il est du type Fresnel, avec les réflecteurs (6) agencés côte à côte et chaque structure de support (18) montée pivotante sur un bâti ( 8 ) . 16. Field of reflectors according to claim 15, characterized in that it is of the Fresnel type, with the reflectors (6) arranged side by side and each support structure (18) pivotally mounted on a frame (8).
17. Système (1) comprenant un capteur solaire (2) ainsi qu'un champ (4) de réflecteurs (6) concentrant le rayonnement solaire sur le capteur, selon la revendication 15 ou la revendication 16. 17. System (1) comprising a solar collector (2) and a field (4) of reflectors (6) concentrating the solar radiation on the sensor, according to claim 15 or claim 16.
EP12703128.4A 2011-02-14 2012-02-13 Improved method for manufacturing a reflector, preferably for the solar energy field Active EP2676164B1 (en)

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US9274306B2 (en) 2016-03-01
BR112013020582A2 (en) 2016-10-25
AU2012217206A1 (en) 2013-09-26
FR2971592B1 (en) 2016-12-23
US20130314813A1 (en) 2013-11-28
ES2677098T3 (en) 2018-07-30
TN2013000306A1 (en) 2015-01-20
WO2012110438A1 (en) 2012-08-23
MA34945B1 (en) 2014-03-01
EP2676164B1 (en) 2018-04-25
TR201809534T4 (en) 2018-07-23
AU2012217206B2 (en) 2015-05-07
FR2971592A1 (en) 2012-08-17
ZA201305456B (en) 2015-01-28

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